<?php
namespace Home\Controller;
use Think\Controller;

class MessageController extends Controller{
    protected $AppSecret = '703099ec53a38802d20e518efb81d4e3';
        protected $AppID = 'wx57b559484ac7a0c1';
    public function index(){
        
        define("TOKEN", "anyluck");
        if (!isset($_GET['echostr'])) {
            $this->responseMsg();
        }else{
            $this->valid();
        }
    }
        
     //验证签名
    public function valid()
     {
        $echoStr = $_GET["echostr"];
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];
        $token = 'anyluck';
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode($tmpArr);
        $tmpStr = sha1($tmpStr);
        if($tmpStr == $signature){
            echo $echoStr;
            exit;
        }
     }
    
    //响应消息
    public function responseMsg()
    {
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        if (!empty($postStr)){
            $this->logger("R \r\n".$postStr);
            $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
            $RX_TYPE = trim($postObj->MsgType);

            if (($postObj->MsgType == "event") && ($postObj->Event == "subscribe" || $postObj->Event == "unsubscribe")){
                //过滤关注和取消关注事件
                /*关注事件应添加自动回复图片消息*/
                
                
            }else{
                
            }
            //若是没有登记进行提示登记
            if('text' == $RX_TYPE || 'image' == $RX_TYPE ){
                
                
            }
            //消息类型分离
            switch ($RX_TYPE)
            {
                case "event":
                    $result = $this->receiveEvent($postObj);
                    break;
                case "text":
                   if (strstr($postObj->Content, "第三方")){
                        //$result = $this->relayPart3("http://www.fangbei.org/test.php".'?'.$_SERVER['QUERY_STRING'], $postStr);
                    }else{
                        $result = $this->receiveText($postObj);
                    }
                    break;
                case "image":
                    $result = $this->receiveImage($postObj);
                    break;
                case "location":
                    $result = $this->receiveLocation($postObj);
                    break;
                case "voice":
                    $result = $this->receiveVoice($postObj);
                    break;
                case "video":
                    $result = $this->receiveVideo($postObj);
                    break;
                case "link":
                    $result = $this->receiveLink($postObj);
                    break;
                default:
                    $result = "unknown msg type: ".$RX_TYPE;
                    break;
            }
            $this->logger("T \r\n".$result);
            echo $result;
        }else {
            echo "";
            exit;
        }
    }

    //接收事件消息
    private function receiveEvent($object)
    {
        $content = "";
        switch ($object->Event)
        {
            case "subscribe":
                $res = M('Keyword')->where("`id`=20002")->find();
                if($res['type'] == 'text'){
                    $content = $res['content'];
                }else{
                    $content = array();
                    $content[] = array("Title"=>$res['title'],  "Description"=>$res['description'], "PicUrl"=>$res['picurl'], "Url" =>$res['content']);
                }
                 //$content .= (!empty($object->EventKey))?("\n来自二维码场景 ".str_replace("qrscene_","",$object->EventKey)):"";
                break;
            case "unsubscribe":
                $content = "取消关注";
                break;
            case "CLICK":
                switch ($object->EventKey)
                {
                    case "Four_victory":
                        $content = array();
                        $list = M('Pic_text')->select();
                        foreach($list as $k => $v){
                            if($v['url'] != ''){
                                $content[] = array("Title"=>"{$v['title']}", "Description"=>"{$v['description']}", "PicUrl"=>"{$v['picurl']}", "Url" =>"{$v['url']}");
                                
                            }
                        }
                        
                        
                        //$content[] = array("Title"=>"寒假活动1 “一大波生活小记者向您袭来！”", "Description"=>"希望小朋友们以小记者的身份深入观察生活中的脏、乱、差现象", "PicUrl"=>"https://mmbiz.qlogo.cn/mmbiz_jpg/A5fooJWkjpkLjpq7QgmhYJbREHK8R5L0TUbp8KEUsWK36t51rrDdBrhfCcDaZPeAdkgTk6ulburAnezejxkuBg/0?wx_fmt=jpeg", "Url" =>"http://mp.weixin.qq.com/s/AyQveDWCY45iEnhMmF9c9w");
                        //$content[] = array("Title"=>"寒假活动1 “一大波生活小记者向您袭来！”", "Description"=>"希望小朋友们以小记者的身份深入观察生活中的脏、乱、差现象", "PicUrl"=>"https://mmbiz.qlogo.cn/mmbiz_jpg/A5fooJWkjpkLjpq7QgmhYJbREHK8R5L0TUbp8KEUsWK36t51rrDdBrhfCcDaZPeAdkgTk6ulburAnezejxkuBg/0?wx_fmt=jpeg", "Url" =>"http://mp.weixin.qq.com/s/AyQveDWCY45iEnhMmF9c9w");
                        //$content[] = array("Title"=>"寒假活动1 “一大波生活小记者向您袭来！”", "Description"=>"希望小朋友们以小记者的身份深入观察生活中的脏、乱、差现象", "PicUrl"=>"https://mmbiz.qlogo.cn/mmbiz_jpg/A5fooJWkjpkLjpq7QgmhYJbREHK8R5L0TUbp8KEUsWK36t51rrDdBrhfCcDaZPeAdkgTk6ulburAnezejxkuBg/0?wx_fmt=jpeg", "Url" =>"http://mp.weixin.qq.com/s/AyQveDWCY45iEnhMmF9c9w");
                         break;
                        default:
                        $content = "点击菜单：".$object->EventKey;
                        break;
                }
                break;
            case "VIEW":
               $content = "跳转链接 ".$object->EventKey;
                break;
            case "SCAN":
                $content = "扫描场景 ".$object->EventKey;
                break;
            case "LOCATION":
                $content = "上传位置：纬度 ".$object->Latitude.";经度 ".$object->Longitude;
                break;
            case "scancode_waitmsg":
                if ($object->ScanCodeInfo->ScanType == "qrcode"){
                    $content = "扫码带提示：类型 二维码 结果：".$object->ScanCodeInfo->ScanResult;
                }else if ($object->ScanCodeInfo->ScanType == "barcode"){
                    $codeinfo = explode(",",strval($object->ScanCodeInfo->ScanResult));
                    $codeValue = $codeinfo[1];
                    $content = "扫码带提示：类型 条形码 结果：".$codeValue;
                }else{
                    $content = "扫码带提示：类型 ".$object->ScanCodeInfo->ScanType." 结果：".$object->ScanCodeInfo->ScanResult;
                }
                break;
            case "scancode_push":
                $content = "扫码推事件";
                break;
            case "pic_sysphoto":
                $content = "系统拍照";
                break;
            case "pic_weixin":
                $content = "相册发图：数量 ".$object->SendPicsInfo->Count;
                break;
            case "pic_photo_or_album":
                $content = "拍照或者相册：数量 ".$object->SendPicsInfo->Count;
                break;
            case "location_select":
                $content = "发送位置：标签 ".$object->SendLocationInfo->Label;
                break;
            default:
                $content = "receive a new event: ".$object->Event;
                break;
        }

        if(is_array($content)){
            if (isset($content[0]['PicUrl'])){
                $result = $this->transmitNews($object, $content);
            }else if (isset($content['MusicUrl'])){
                $result = $this->transmitMusic($object, $content);
            }
        }else{
            $result = $this->transmitText($object, $content);
        }
        return $result;
    }

    //接收文本消息
    private function receiveText($object)
    {
        $keyword = trim($object->Content);
        //多客服人工回复模式
        // if (strstr($keyword, "请问在吗") || strstr($keyword, "在线客服")){
            // $result = $this->transmitService($object);
            // return $result;
        // }
        //保存数据库
        $data['content'] = $keyword;
        $data['openid'] = $object->FromUserName."";
        $data['type'] = $object->MsgType."";
        $data['add_time'] = time();
        $data['msg_id'] = $object->MsgId.'';
        $data['status'] = 0;
        //file_put_contents('./test.txt',$object->FromUserName."/".$object->MsgType."/".$object->MsgId);
        M('Message')->add($data);
        $re = M('Member')->where("`openid` = '".$object->FromUserName."'")->find();
        if(empty($re)){
            $content = "请通过学生登录入口先进行登记信息！";
            $result = $this->transmitText($object, $content);
            echo  $result;
        }else{
            //关键字自动回复模式
            $list = M('keyword')->where("id <> 10001 AND id <> 20002")->select();
            foreach($list as $k => $v){
                if (strstr($keyword, $v['keyword'])){
                    if($v['type'] == 'text'){
                        $content = $v['content'];
                    }else{
                        $content = array();
                        $content[] = array("Title"=>$v['title'],  "Description"=>$v['description'], "PicUrl"=>$v['picurl'], "Url" =>$v['content']);
                    }
                }   
            }       
        }

        /*else if (strstr($keyword, "活动")){
            $content = "中国：".$this->bytes_to_emoji(0x1F1E8).$this->bytes_to_emoji(0x1F1F3)."\n仙人掌：".$this->bytes_to_emoji(0x1F335);
        }else if (strstr($keyword, "单图文")){
            $content = array();
            $content[] = array("Title"=>"单图文标题",  "Description"=>"单图文内容", "PicUrl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
        }else if (strstr($keyword, "图文") || strstr($keyword, "多图文")){
            $content = array();
            $content[] = array("Title"=>"多图文1标题", "Description"=>"", "PicUrl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $content[] = array("Title"=>"多图文2标题", "Description"=>"", "PicUrl"=>"http://d.hiphotos.bdimg.com/wisegame/pic/item/f3529822720e0cf3ac9f1ada0846f21fbe09aaa3.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $content[] = array("Title"=>"多图文3标题", "Description"=>"", "PicUrl"=>"http://g.hiphotos.bdimg.com/wisegame/pic/item/18cb0a46f21fbe090d338acc6a600c338644adfd.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
        }else if (strstr($keyword, "音乐")){
            $content = array();
            $content = array("Title"=>"最炫民族风", "Description"=>"歌手：凤凰传奇", "MusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3", "HQMusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3"); 
        }else{
            $content = date("Y-m-d H:i:s",time())."\nOpenID：".$object->FromUserName."\n技术支持 方倍工作室";
        }*/

        if(is_array($content)){
            if (isset($content[0])){
                $result = $this->transmitNews($object, $content);
            }else if (isset($content['MusicUrl'])){
                $result = $this->transmitMusic($object, $content);
            }
        }else{
            $result = $this->transmitText($object, $content);
        }
        return $result;
    }

    //接收图片消息
    private function receiveImage($object)
    {
        //首先进行图片下载
        $assess_token = S('assess_token');
        if(empty($assess_token)){
            $http =  "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->AppID."&secret=".$this->AppSecret;
            
            $result = $this->curl_get($http);
            
            $assess_token = $result['access_token'];
            S('assess_token',$assess_token);
            S('assess_time',time());
        }
        $assess_time = S('assess_time');
        if(time() - $assess_time >= 7200){
            $http =  "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->AppID."&secret=".$this->AppSecret;
            $result = $this->curl_get($http);
            
            $assess_token = $result['access_token'];
            S('assess_token',$assess_token);
            S('assess_time',time());
        }
        
        //file_put_contents('./message.txt',$MediaId.'|||'.$assess_token);
        
        $http = "https://api.weixin.qq.com/cgi-bin/media/get?access_token={$assess_token}&media_id={$object->MediaId}";
    
        $url = $this->saveMedia($http);
        $url = $this->addWater($url,$object->FromUserName.'');
        //然后进行数据库储存
        $data['content'] = "<img src='{$url}' title='' width='100%' height='100%' >";
        $data['openid'] = $object->FromUserName.'';
        $data['type'] = $object->MsgType.'';
        $data['add_time'] = $object->CreateTime.'';
        $data['msg_id'] = $object->MsgId.'';
        $data['status'] = 0;
        
        $result = M('Message')->add($data);
        $re = M('Member')->where("`openid` = '".$object->FromUserName."'")->find();
        if(empty($re)){
            $content = "请通过学生登录入口先进行登记信息！";
            $result = $this->transmitText($object, $content);
            echo  $result;
        }else{
            $res = M('Keyword')->where("`id`=10001")->find();
            if($res['type'] == 'text'){
                $content = $res['content'];
                $result = $this->transmitText($object, $content);
            }else{
                $content = array();
                $content[] = array("Title"=>$res['title'],  "Description"=>$res['description'], "PicUrl"=>$res['picurl'], "Url" =>$res['content']);
                $result = $this->transmitNews($object, $content);
            }
                
        }
        return $result;
    }

    //接收位置消息
    private function receiveLocation($object)
    {
        $content = "你发送的是位置，经度为：".$object->Location_Y."；纬度为：".$object->Location_X."；缩放级别为：".$object->Scale."；位置为：".$object->Label;
        $result = $this->transmitText($object, $content);
        return $result;
    }

    //接收语音消息
    private function receiveVoice($object)
    {
        if (isset($object->Recognition) && !empty($object->Recognition)){
            $content = "你刚才说的是：".$object->Recognition;
            $result = $this->transmitText($object, $content);
        }else{
            $content = array("MediaId"=>$object->MediaId);
            $result = $this->transmitVoice($object, $content);
        }
        return $result;
    }

    //接收视频消息
    private function receiveVideo($object)
    {
        $content = array("MediaId"=>$object->MediaId, "ThumbMediaId"=>$object->ThumbMediaId, "Title"=>"", "Description"=>"");
        $result = $this->transmitVideo($object, $content);
        return $result;
    }

    //接收链接消息
    private function receiveLink($object)
    {
        //存储到数据库
        $data['content'] = "<a href='{$object->Url}' title='{$object->Description}' >{$object->Title}</a>";
        $data['openid'] = $object->FromUserName.'';
        $data['type'] = $object->MsgType.'';
        $data['add_time'] = $object->CreateTime.'';
        $data['msg_id'] = $object->MsgId.'';
        $data['status'] = 0;
        
        M('Message')->add($data);
        
        $content = "你发送的是链接，标题为：".$object->Title."；内容为：".$object->Description."；链接地址为：".$object->Url;
        $result = $this->transmitText($object, $content);
        return $result;
    }

    //回复文本消息
    private function transmitText($object, $content)
    {
        if (!isset($content) || empty($content)){
            return "";
        }

        $xmlTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[text]]></MsgType>
    <Content><![CDATA[%s]]></Content>
</xml>";
        $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time(), $content);

        return $result;
    }

    //回复图文消息
    private function transmitNews($object, $newsArray)
    {
        if(!is_array($newsArray)){
            return "";
        }
        $itemTpl = "        <item>
            <Title><![CDATA[%s]]></Title>
            <Description><![CDATA[%s]]></Description>
            <PicUrl><![CDATA[%s]]></PicUrl>
            <Url><![CDATA[%s]]></Url>
        </item>
";
        $item_str = "";
        foreach ($newsArray as $item){
            $item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['PicUrl'], $item['Url']);
        }
        $xmlTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[news]]></MsgType>
    <ArticleCount>%s</ArticleCount>
    <Articles>
$item_str    </Articles>
</xml>";

        $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time(), count($newsArray));
        return $result;
    }

    //回复音乐消息
    private function transmitMusic($object, $musicArray)
    {
        if(!is_array($musicArray)){
            return "";
        }
        $itemTpl = "<Music>
        <Title><![CDATA[%s]]></Title>
        <Description><![CDATA[%s]]></Description>
        <MusicUrl><![CDATA[%s]]></MusicUrl>
        <HQMusicUrl><![CDATA[%s]]></HQMusicUrl>
    </Music>";

        $item_str = sprintf($itemTpl, $musicArray['Title'], $musicArray['Description'], $musicArray['MusicUrl'], $musicArray['HQMusicUrl']);

        $xmlTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[music]]></MsgType>
    $item_str
</xml>";

        $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time());
        return $result;
    }

    //回复图片消息
    private function transmitImage($object, $imageArray)
    {
        $itemTpl = "<Image>
        <MediaId><![CDATA[%s]]></MediaId>
    </Image>";

        $item_str = sprintf($itemTpl, $imageArray['MediaId']);

        $xmlTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[image]]></MsgType>
    $item_str
</xml>";

        $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time());
        return $result;
    }

    //回复语音消息
    private function transmitVoice($object, $voiceArray)
    {
        $itemTpl = "<Voice>
        <MediaId><![CDATA[%s]]></MediaId>
    </Voice>";

        $item_str = sprintf($itemTpl, $voiceArray['MediaId']);
        $xmlTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[voice]]></MsgType>
    $item_str
</xml>";

        $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time());
        return $result;
    }

    //回复视频消息
    private function transmitVideo($object, $videoArray)
    {
        $itemTpl = "<Video>
        <MediaId><![CDATA[%s]]></MediaId>
        <ThumbMediaId><![CDATA[%s]]></ThumbMediaId>
        <Title><![CDATA[%s]]></Title>
        <Description><![CDATA[%s]]></Description>
    </Video>";

        $item_str = sprintf($itemTpl, $videoArray['MediaId'], $videoArray['ThumbMediaId'], $videoArray['Title'], $videoArray['Description']);

        $xmlTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[video]]></MsgType>
    $item_str
</xml>";

        $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time());
        return $result;
    }

    //回复多客服消息
    private function transmitService($object)
    {
        $xmlTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[transfer_customer_service]]></MsgType>
</xml>";
        $result = sprintf($xmlTpl, $object->FromUserName, $object->ToUserName, time());
        return $result;
    }

    //回复第三方接口消息
    private function relayPart3($url, $rawData)
    {
        $headers = array("Content-Type: text/xml; charset=utf-8");
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $rawData);
        $output = curl_exec($ch);
        curl_close($ch);
        return $output;
    }

    //字节转Emoji表情
    function bytes_to_emoji($cp)
    {
        if ($cp > 0x10000){       # 4 bytes
            return chr(0xF0 | (($cp & 0x1C0000) >> 18)).chr(0x80 | (($cp & 0x3F000) >> 12)).chr(0x80 | (($cp & 0xFC0) >> 6)).chr(0x80 | ($cp & 0x3F));
        }else if ($cp > 0x800){   # 3 bytes
            return chr(0xE0 | (($cp & 0xF000) >> 12)).chr(0x80 | (($cp & 0xFC0) >> 6)).chr(0x80 | ($cp & 0x3F));
        }else if ($cp > 0x80){    # 2 bytes
            return chr(0xC0 | (($cp & 0x7C0) >> 6)).chr(0x80 | ($cp & 0x3F));
        }else{                    # 1 byte
            return chr($cp);
        }
    }

    //日志记录
    private function logger($log_content)
    {
        if(isset($_SERVER['HTTP_APPNAME'])){   //SAE
            sae_set_display_errors(false);
            sae_debug($log_content);
            sae_set_display_errors(true);
        }else if($_SERVER['REMOTE_ADDR'] != "127.0.0.1"){ //LOCAL
            $max_size = 1000000;
            $log_filename = "log.xml";
            if(file_exists($log_filename) and (abs(filesize($log_filename)) > $max_size)){unlink($log_filename);}
            file_put_contents($log_filename, date('Y-m-d H:i:s')." ".$log_content."\r\n", FILE_APPEND);
        }
    }
    //从微信端将获取图片进行下载到服务器上
    protected function saveMedia($url){
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_HEADER, 0);    
        curl_setopt($ch, CURLOPT_NOBODY, 0);    //对body进行输出。
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $package = curl_exec($ch);
        $httpinfo = curl_getinfo($ch);
       
        curl_close($ch);
        $media = array_merge(array('mediaBody' => $package), $httpinfo);
        
        //求出文件格式
        preg_match('/\w\/(\w+)/i', $media["content_type"], $extmatches);
        $fileExt = $extmatches[1];
        $filename = time().rand(100,999).".{$fileExt}";
        $dirname = "./Uploads/";
        if(!file_exists($dirname)){
            mkdir($dirname,0777,true);
        }
        file_put_contents($dirname.$filename,$media['mediaBody']);
        return ltrim($dirname.$filename,'.');
    }
    protected function curl_get($http){
        //初始化
            $ch = curl_init();
            //设置选项，包括URL
            curl_setopt($ch, CURLOPT_URL, $http);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_HEADER, 0);
            //执行并获取HTML文档内容
            $output = curl_exec($ch);
            //释放curl句柄
            curl_close($ch);
            //打印获得的数据
            $result = json_decode($output,true);
            return $result;
    }
    
    //添加水印信息
    public function addWater($url,$openid){
        $url = '.'.ltrim($url,'.');//强制转换正确地址
        //获取学生信息
        $info = M('Member')->where("yang_member.openid='{$openid}'")->find();
        //获取搜索出的年级分类
        $school = M('Type')->Field('id,parent_id,name')->select();
        foreach($school as $k=>$v){
            $school[$v['id']] = $v['name'];
        }
        
        //格式化学生的班级信息
        
        $info['school'] = $school[$info['school']];
        $info['grade'] = $school[$info['grade']];
        $info['class'] = $school[$info['class']];
        
        $str = $info['school']."\n".$info['grade'].$info['class'].' '.$info['realname'];
        //产生一个新地址
        do{ 
            $filename = './Uploads/'."W".rand(1000,9999).time().'jpg';
        }while(file_exists($filename));
        $image = new \Think\Image();
        $image->open($url)->text($str,'./K12.ttf',40,'#000000',\Think\Image::IMAGE_WATER_SOUTHEAST)->save($filename);
        return ltrim($filename,'.');
    }
    
}